The new strategy of having separate approaches to their PR could already have been in the works before the bullying exposure, they are possibly not linked at all.
Invictus Germany, Nigeria and Colombia were PR fiascos, and the Vancouver pre-event was another debacle. They are very unpopular in the UK, and in the US very few are interested in them, other than the outlets who are paid to promote them and a few of their rich benefactors. Harry has clearly been miserable, the whole world could see that, they are pretty much a laughing stock after their efforts at doing tours to dodgy countries and their business and charity failures.
Their currency has been Harry being a member of the British Royal family, they have been unable to move the dial on that, so they have no other option now but to backtrack to basics, try to rebuild their credibility based on the one thing that gave Harry validity, (and gave his wife credibility) i.e Harry and the RF.
I suspect the bullying claims have thrown a real spanner in the works, I don't think it was part of the original strategy of them separating their interests and PR. The idiotic sycophantic counter claims, another own goal, everyone knows the people who spoke to the press were released from part of their NDA before they were approved to comment, and the statements scrutinised by legal and what must be, a very ineffective image management organisation.
I do find it amusing that a huge amount of the public now suspect Harry is behind the exposure of his wifes' bullying and the negative press about her, would he really throw his wife under the bus? I guess based on past behaviour it's not beyond the realms of possibility.